[HIVE-5670] annoying ZK exceptions are annoying

• Type: Task
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.13.0
• Assignee: Sergey Shelukhin
• Reporter: Sergey Shelukhin
• Created: 28/Oct/13 17:16
• Updated: 31/Oct/13 00:51
• Resolved: 31/Oct/13 00:51

Description

when I run tests locally (or on cluster IIRC) there are bunch of ZK-related exceptions in Hive log, such as

2013-10-28 09:50:50,851 ERROR zookeeper.ClientCnxn (ClientCnxn.java:processEvent(523)) - Error while calling watcher 
java.lang.NullPointerException
   at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:521)
   at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:497)
   
   2013-10-28 09:51:05,747 DEBUG server.NIOServerCnxn (NIOServerCnxn.java:closeSock(1024)) - ignoring exception during input shutdown
java.net.SocketException: Socket is not connected
   at sun.nio.ch.SocketChannelImpl.shutdown(Native Method)
   at sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:633)
   at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:360)
   at org.apache.zookeeper.server.NIOServerCnxn.closeSock(NIOServerCnxn.java:1020)
   at org.apache.zookeeper.server.NIOServerCnxn.close(NIOServerCnxn.java:977)
   at org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:347)
   at org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:224)
   at java.lang.Thread.run(Thread.java:680)

They are annoying when you look for actual problems in logs.

Those on DEBUG level should be silenced via log levels for ZK classes by default. Not sure what to do with ERROR level one(s?), I'd need to look if they can be silenced/logged as DEBUG on hive side, or maybe file a bug for ZK...